patch-2.3.31 linux/drivers/char/joystick/joy-sidewinder.c
Next file: linux/drivers/char/joystick/joy-spaceball.c
Previous file: linux/drivers/char/joystick/joy-pci.c
Back to the patch index
Back to the overall index
- Lines: 972
- Date:
Tue Dec 7 10:13:11 1999
- Orig file:
v2.3.30/linux/drivers/char/joystick/joy-sidewinder.c
- Orig date:
Sun Nov 7 16:37:34 1999
diff -u --recursive --new-file v2.3.30/linux/drivers/char/joystick/joy-sidewinder.c linux/drivers/char/joystick/joy-sidewinder.c
@@ -1,7 +1,9 @@
/*
* joy-sidewinder.c Version 1.2
*
- * Copyright (c) 1998 Vojtech Pavlik
+ * Copyright (c) 1998-1999 Vojtech Pavlik
+ *
+ * Sponsored by SuSE
*/
/*
@@ -38,18 +40,36 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
+#include <linux/init.h>
-#define JS_SW_MAX_START 250
-#define JS_SW_MIN_STROBE 25
-#define JS_SW_EXT_STROBE 45
-#define JS_SW_MIN_TIME 1500
-#define JS_SW_MAX_TIME 4000
-
-#define JS_SW_MAX_LENGTH 72
-
-#define JS_SW_MODE_3DP 1
-#define JS_SW_MODE_PP 2
-#define JS_SW_MODE_GP 3
+/*
+ * These are really magic values. Changing them can make a problem go away,
+ * as well as break everything.
+ */
+
+#undef JS_SW_DEBUG
+
+#define JS_SW_START 400 /* The time we wait for the first bit [400 us] */
+#define JS_SW_STROBE 45 /* Max time per bit [45 us] */
+#define JS_SW_TIMEOUT 4000 /* Wait for everything to settle [4 ms] */
+#define JS_SW_KICK 45 /* Wait after A0 fall till kick [45 us] */
+#define JS_SW_END 8 /* Number of bits before end of packet to kick */
+#define JS_SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */
+#define JS_SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */
+#define JS_SW_OK 64 /* Number of packet read successes to switch optimization back on */
+#define JS_SW_LENGTH 512 /* Max number of bits in a packet */
+
+/*
+ * SideWinder joystick types ...
+ */
+
+#define JS_SW_TYPE_3DP 1
+#define JS_SW_TYPE_F23 2
+#define JS_SW_TYPE_GP 3
+#define JS_SW_TYPE_PP 4
+#define JS_SW_TYPE_FFP 5
+#define JS_SW_TYPE_FSP 6
+#define JS_SW_TYPE_FFW 7
static int js_sw_port_list[] __initdata = {0x201, 0};
static struct js_port* js_sw_port __initdata = NULL;
@@ -61,208 +81,398 @@
struct js_sw_info {
int io;
- unsigned char mode;
+ int length;
+ int speed;
+ unsigned char type;
+ unsigned char bits;
unsigned char number;
- unsigned char optimize;
+ unsigned char fail;
+ unsigned char ok;
};
/*
- * js_sw_init_digital() switches a SideWinder into digital mode.
+ * Gameport speed.
+ */
+
+unsigned int js_sw_io_speed = 0;
+
+/*
+ * js_sw_measure_speed() measures the gameport i/o speed.
*/
-static void __init js_sw_init_digital(int io)
+static int __init js_sw_measure_speed(int io)
{
- unsigned int t;
- unsigned int timeout = (js_time_speed * JS_SW_MAX_TIME) >> 10;
- int delays[] = {140, 140+726, 140+300, 0};
- int i = 0;
+#ifdef __i386__
+
+#define GET_TIME(x) do { outb(0, 0x43); x = inb(0x40); x |= inb(0x40) << 8; } while (0)
+#define DELTA(x,y) ((y)-(x)+((y)<(x)?1193180L/HZ:0))
+
+ unsigned int i, t, t1, t2, t3, tx;
unsigned long flags;
- __save_flags(flags);
- __cli();
- do {
- outb(0xff,io);
- t = js_get_time();
- while ((inb(io) & 1) && (js_delta(js_get_time(),t) < timeout));
- udelay(delays[i]);
- } while (delays[i++]);
- __restore_flags(flags);
+ tx = 1 << 30;
- for (i = 0; i < 4; i++) {
- udelay(300);
- outb(0xff, io);
+ for(i = 0; i < 50; i++) {
+ save_flags(flags); /* Yes, all CPUs */
+ cli();
+ GET_TIME(t1);
+ for(t = 0; t < 50; t++) inb(io);
+ GET_TIME(t2);
+ GET_TIME(t3);
+ restore_flags(flags);
+ udelay(i * 10);
+ if ((t = DELTA(t2,t1) - DELTA(t3,t2)) < tx) tx = t;
}
- return;
+ return 59659 / t;
+
+#else
+
+ unsigned int j, t = 0;
+
+ j = jiffies; while (j == jiffies);
+ j = jiffies; while (j == jiffies) { t++; inb(0x201); }
+
+ return t * HZ / 1000;
+
+#endif
}
/*
- * js_sw_read_packet() reads a SideWinder packet.
+ * js_sw_read_packet() is a function which reads either a data packet, or an
+ * identification packet from a SideWinder joystick. Better don't try to
+ * understand this, since all the ugliness of the Microsoft Digital
+ * Overdrive protocol is concentrated in this function. If you really want
+ * to know how this works, first go watch a couple horror movies, so that
+ * you are well prepared, read US patent #5628686 and then e-mail me,
+ * and I'll send you an explanation.
+ * Vojtech <vojtech@suse.cz>
*/
-static int js_sw_read_packet(int io, int l1, int l2, int strobe, __u64 *data)
+static int js_sw_read_packet(int io, int speed, unsigned char *buf, int length, int id)
{
- static unsigned char buf[JS_SW_MAX_LENGTH];
- unsigned char u, v;
- int i;
unsigned long flags;
- unsigned int t, t1;
-
- int length = l1 < l2 ? l2 : l1;
- int start = (js_time_speed * JS_SW_MAX_START) >> 10;
- strobe = (js_time_speed * strobe) >> 10;
+ int timeout, bitout, sched, i, kick, start, strobe;
+ unsigned char pending, u, v;
- i = 0;
+ i = -id; /* Don't care about data, only want ID */
+ timeout = id ? (JS_SW_TIMEOUT * speed) >> 10 : 0; /* Set up global timeout for ID packet */
+ kick = id ? (JS_SW_KICK * speed) >> 10 : 0; /* Set up kick timeout for ID packet */
+ start = (JS_SW_START * speed) >> 10;
+ strobe = (JS_SW_STROBE * speed) >> 10;
+ bitout = start;
+ pending = 0;
+ sched = 0;
- __save_flags(flags);
- __cli();
- outb(0xff,io);
+ __save_flags(flags); /* Quiet, please */
+ __cli();
+ outb(0xff, io); /* Trigger */
v = inb(io);
- t = js_get_time();
do {
+ bitout--;
u = v;
v = inb(io);
- t1 = js_get_time();
- } while (!((u ^ v) & u & 0x10) && js_delta(t1, t) < start);
+ } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */
- t = t1;
+ if (bitout > 0) bitout = strobe; /* Extend time if not timed out */
+
+ while ((timeout > 0 || bitout > 0) && (i < length)) {
+
+ timeout--;
+ bitout--; /* Decrement timers */
+ sched--;
- do {
- v = inb(io);
- t1 = js_get_time();
- if ((u ^ v) & v & 0x10) {
- buf[i++] = v >> 5;
- t = t1;
- }
u = v;
- } while (i < length && js_delta(t1,t) < strobe);
+ v = inb(io);
- __restore_flags(flags);
+ if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */
+ if (i >= 0) /* Want this data */
+ buf[i] = v >> 5; /* Store it */
+ i++; /* Advance index */
+ bitout = strobe; /* Extend timeout for next bit */
+ }
+
+ if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */
+ sched = kick; /* Schedule second trigger */
+ kick = 0; /* Don't schedule next time on falling edge */
+ pending = 1; /* Mark schedule */
+ }
+
+ if (pending && sched < 0 && (i > -JS_SW_END)) { /* Second trigger time */
+ outb(0xff, io); /* Trigger */
+ bitout = start; /* Long bit timeout */
+ pending = 0; /* Unmark schedule */
+ timeout = 0; /* Switch from global to bit timeouts */
+ }
+ }
- *data = 0;
+ __restore_flags(flags); /* Done - relax */
- if (i == l1) {
- t = i > 64 ? 64 : i;
- for (i = 0; i < t; i++)
- *data |= (__u64) (buf[i] & 1) << i;
- return t;
- }
- if (i == l2) {
- t = i > 22 ? 22 : i;
- for (i = 0; i < t; i++)
- *data |= (__u64) buf[i] << (3 * i);
- return t * 3;
+#ifdef JS_SW_DEBUG
+ {
+ int j;
+ printk(KERN_DEBUG "joy-sidewinder: Read %d triplets. [", i);
+ for (j = 0; j < i; j++) printk("%d", buf[j]);
+ printk("]\n");
}
+#endif
return i;
}
/*
- * js_sw_parity computes parity of __u64
+ * js_sw_get_bits() and GB() compose bits from the triplet buffer into a __u64.
+ * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
+ * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
+ * is number of bits per triplet.
+ */
+
+#define GB(pos,num,shift) js_sw_get_bits(buf, pos, num, shift, info->bits)
+
+static __u64 js_sw_get_bits(unsigned char *buf, int pos, int num, char shift, char bits)
+{
+ __u64 data = 0;
+ int tri = pos % bits; /* Start position */
+ int i = pos / bits;
+ int bit = shift;
+
+ while (num--) {
+ data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */
+ if (tri == bits) {
+ i++; /* Next triplet */
+ tri = 0;
+ }
+ }
+
+ return data;
+}
+
+/*
+ * js_sw_init_digital() initializes a SideWinder 3D Pro joystick
+ * into digital mode.
+ */
+
+static void js_sw_init_digital(int io, int speed)
+{
+ int seq[] = { 140, 140+725, 140+300, 0 };
+ unsigned long flags;
+ int i, t;
+
+ __save_flags(flags);
+ __cli();
+
+ i = 0;
+ do {
+ outb(0xff, io); /* Trigger */
+ t = (JS_SW_TIMEOUT * speed) >> 10;
+ while ((inb(io) & 1) && t) t--; /* Wait for axis to fall back to 0 */
+ udelay(seq[i]); /* Delay magic time */
+ } while (seq[++i]);
+
+ outb(0xff, io); /* Last trigger */
+
+ __restore_flags(flags);
+}
+
+/*
+ * js_sw_parity() computes parity of __u64
*/
static int js_sw_parity(__u64 t)
{
- t ^= t >> 32;
- t ^= t >> 16;
- t ^= t >> 8;
- t ^= t >> 4;
- t ^= t >> 2;
- t ^= t >> 1;
- return t & 1;
+ int x = t ^ (t >> 32);
+ x ^= x >> 16;
+ x ^= x >> 8;
+ x ^= x >> 4;
+ x ^= x >> 2;
+ x ^= x >> 1;
+ return x & 1;
}
/*
- * js_sw_csum() computes checksum of nibbles in __u64
+ * js_sw_ccheck() checks synchronization bits and computes checksum of nibbles.
*/
-static int js_sw_csum(__u64 t)
+static int js_sw_check(__u64 t)
{
char sum = 0;
- while (t) {
+
+ if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */
+ return -1;
+
+ while (t) { /* Sum */
sum += t & 0xf;
t >>= 4;
}
+
return sum & 0xf;
}
/*
- * js_sw_read() reads and analyzes SideWinder joystick data.
+ * js_sw_parse() analyzes SideWinder joystick data, and writes the results into
+ * the axes and buttons arrays.
*/
-static int js_sw_read(void *xinfo, int **axes, int **buttons)
+static int js_sw_parse(unsigned char *buf, struct js_sw_info *info, int **axes, int **buttons)
{
- struct js_sw_info *info = xinfo;
- __u64 data;
int hat, i;
- switch (info->mode) {
-
- case JS_SW_MODE_3DP:
+ switch (info->type) {
- if (info->optimize) {
- i = js_sw_read_packet(info->io, -1, 22, JS_SW_EXT_STROBE, &data);
- } else {
- i = js_sw_read_packet(info->io, 64, 66, JS_SW_EXT_STROBE, &data);
- if (i == 198) info->optimize = 1;
- }
+ case JS_SW_TYPE_3DP:
+ case JS_SW_TYPE_F23:
- if (i < 60) {
- js_sw_init_digital(info->io);
- info->optimize = 0;
- return -1;
- }
+ if (js_sw_check(GB(0,64,0)) || (hat = GB(6,1,3) | GB(60,3,0)) > 8) return -1;
- if (((data & 0x8080808080808080ULL) ^ 0x80) || js_sw_csum(data) ||
- (hat = ((data >> 3) & 0x08) | ((data >> 60) & 0x07)) > 8) {
- info->optimize = 0;
- return -1;
- }
- axes[0][0] = ((data << 4) & 0x380) | ((data >> 16) & 0x07f);
- axes[0][1] = ((data << 7) & 0x380) | ((data >> 24) & 0x07f);
- axes[0][2] = ((data >> 28) & 0x180) | ((data >> 40) & 0x07f);
- axes[0][3] = ((data >> 25) & 0x380) | ((data >> 48) & 0x07f);
+ axes[0][0] = GB( 3,3,7) | GB(16,7,0);
+ axes[0][1] = GB( 0,3,7) | GB(24,7,0);
+ axes[0][2] = GB(35,2,7) | GB(40,7,0);
+ axes[0][3] = GB(32,3,7) | GB(48,7,0);
axes[0][4] = js_sw_hat_to_axis[hat].x;
axes[0][5] = js_sw_hat_to_axis[hat].y;
- buttons[0][0] = ((~data >> 31) & 0x80) | ((~data >> 8) & 0x7f);
+ buttons[0][0] = ~(GB(37,1,8) | GB(38,1,7) | GB(8,7,0));
+
+ return 0;
+
+ case JS_SW_TYPE_GP:
+
+ for (i = 0; i < info->number * 15; i += 15) {
+
+ if (js_sw_parity(GB(i,15,0))) return -1;
+
+ axes[i][0] = GB(i+3,1,0) - GB(i+2,1,0);
+ axes[i][1] = GB(i+0,1,0) - GB(i+1,1,0);
+ buttons[i][0] = ~GB(i+4,10,0);
+
+ }
return 0;
- case JS_SW_MODE_PP:
+ case JS_SW_TYPE_PP:
+ case JS_SW_TYPE_FFP:
- if (js_sw_read_packet(info->io, 48, 16, JS_SW_EXT_STROBE, &data) != 48) return -1;
- if (!js_sw_parity(data) || (hat = (data >> 42) & 0xf) > 8) return -1;
+ if (!js_sw_parity(GB(0,48,0)) || (hat = GB(42,4,0)) > 8) return -1;
- axes[0][0] = (data >> 9) & 0x3ff;
- axes[0][1] = (data >> 19) & 0x3ff;
- axes[0][2] = (data >> 29) & 0x07f;
- axes[0][3] = (data >> 36) & 0x03f;
+ axes[0][0] = GB( 9,10,0);
+ axes[0][1] = GB(19,10,0);
+ axes[0][2] = GB(36, 6,0);
+ axes[0][3] = GB(29, 7,0);
axes[0][4] = js_sw_hat_to_axis[hat].x;
axes[0][5] = js_sw_hat_to_axis[hat].y;
- buttons[0][0] = ~data & 0x1ff;
+ buttons[0][0] = ~GB(0,9,0);
return 0;
- case JS_SW_MODE_GP:
+ case JS_SW_TYPE_FSP:
- if (js_sw_read_packet(info->io, 15 * info->number, 5 * info->number,
- JS_SW_EXT_STROBE, &data) != 15 * info->number) return -1;
- if (js_sw_parity(data)) return -1;
-
- for (i = 0; i < info->number; i++) {
- axes[i][0] = ((data >> 3) & 1) - ((data >> 2) & 1);
- axes[i][1] = ( data & 1) - ((data >> 1) & 1);
- buttons[i][0] = (~data >> 4) & 0x3ff;
- data >>= 15;
- }
+ if (!js_sw_parity(GB(0,43,0)) || (hat = GB(28,4,0)) > 8) return -1;
+
+ axes[0][0] = GB( 0,10,0);
+ axes[0][1] = GB(16,10,0);
+ axes[0][2] = GB(32, 6,0);
+ axes[0][3] = js_sw_hat_to_axis[hat].x;
+ axes[0][4] = js_sw_hat_to_axis[hat].y;
+ buttons[0][0] = ~(GB(10,6,0) | GB(26,2,6) | GB(38,2,8));
+
+ return 0;
+
+ case JS_SW_TYPE_FFW:
+
+ if (!js_sw_parity(GB(0,33,0))) return -1;
+
+ axes[0][0] = GB( 0,10,0);
+ axes[0][1] = GB(10, 6,0);
+ axes[0][2] = GB(16, 6,0);
+ buttons[0][0] = ~GB(22,8,0);
return 0;
+ }
+
+ return -1;
+}
+
+/*
+ * js_sw_read() reads SideWinder joystick data, and reinitializes
+ * the joystick in case of persistent problems. This is the function that is
+ * called from the generic code to poll the joystick.
+ */
+
+static int js_sw_read(void *xinfo, int **axes, int **buttons)
+{
+ struct js_sw_info *info = xinfo;
+ unsigned char buf[JS_SW_LENGTH];
+ int i;
+
+ i = js_sw_read_packet(info->io, info->speed, buf, info->length, 0);
+
+ if (info->type <= JS_SW_TYPE_F23 && info->length == 66 && i != 66) { /* Broken packet, try to fix */
- default:
- return -1;
+ if (i == 64 && !js_sw_check(js_sw_get_bits(buf,0,64,0,1))) { /* Last init failed, 1 bit mode */
+ printk(KERN_WARNING "joy-sidewinder: Joystick in wrong mode on %#x"
+ " - going to reinitialize.\n", info->io);
+ info->fail = JS_SW_FAIL; /* Reinitialize */
+ i = 128; /* Bogus value */
+ }
+
+ if (i < 66 && GB(0,64,0) == GB(i*3-66,64,0)) /* 1 == 3 */
+ i = 66; /* Everything is fine */
+
+ if (i < 66 && GB(0,64,0) == GB(66,64,0)) /* 1 == 2 */
+ i = 66; /* Everything is fine */
+
+ if (i < 66 && GB(i*3-132,64,0) == GB(i*3-66,64,0)) { /* 2 == 3 */
+ memmove(buf, buf + i - 22, 22); /* Move data */
+ i = 66; /* Carry on */
+ }
+ }
+
+ if (i == info->length && !js_sw_parse(buf, info, axes, buttons)) { /* Parse data */
+
+ info->fail = 0;
+ info->ok++;
+
+ if (info->type <= JS_SW_TYPE_F23 && info->length == 66 /* Many packets OK */
+ && info->ok > JS_SW_OK) {
+
+ printk(KERN_INFO "joy-sidewinder: No more trouble on %#x"
+ " - enabling optimization again.\n", info->io);
+ info->length = 22;
+ }
+
+ return 0;
}
+
+ info->ok = 0;
+ info->fail++;
+
+ if (info->type <= JS_SW_TYPE_F23 && info->length == 22 /* Consecutive bad packets */
+ && info->fail > JS_SW_BAD) {
+
+ printk(KERN_INFO "joy-sidewinder: Many bit errors on %#x"
+ " - disabling optimization.\n", info->io);
+ info->length = 66;
+ }
+
+ if (info->fail < JS_SW_FAIL) return -1; /* Not enough, don't reinitialize yet */
+
+ printk(KERN_WARNING "joy-sidewinder: Too many bit errors on %#x"
+ " - reinitializing joystick.\n", info->io);
+
+ if (!i && info->type <= JS_SW_TYPE_F23) { /* 3D Pro can be in analog mode */
+ udelay(3 * JS_SW_TIMEOUT);
+ js_sw_init_digital(info->io, info->speed);
+ }
+
+ udelay(JS_SW_TIMEOUT);
+ i = js_sw_read_packet(info->io, info->speed, buf, JS_SW_LENGTH, 0); /* Read normal data packet */
+ udelay(JS_SW_TIMEOUT);
+ js_sw_read_packet(info->io, info->speed, buf, JS_SW_LENGTH, i); /* Read ID packet, this initializes the stick */
+
+ info->fail = JS_SW_FAIL;
+
+ return -1;
}
/*
@@ -290,7 +500,7 @@
* SideWinders.
*/
-static void __init js_sw_init_corr(int num_axes, int mode, int number, struct js_corr **corr)
+static void __init js_sw_init_corr(int num_axes, int type, int number, struct js_corr **corr)
{
int i, j;
@@ -305,9 +515,10 @@
corr[i][j].coef[3] = (1 << 29) / (511 - 32);
}
- switch (mode) {
+ switch (type) {
- case JS_SW_MODE_3DP:
+ case JS_SW_TYPE_3DP:
+ case JS_SW_TYPE_F23:
corr[i][2].type = JS_CORR_BROKEN;
corr[i][2].prec = 4;
@@ -320,33 +531,73 @@
break;
- case JS_SW_MODE_PP:
+ case JS_SW_TYPE_PP:
+ case JS_SW_TYPE_FFP:
corr[i][2].type = JS_CORR_BROKEN;
- corr[i][2].prec = 1;
- corr[i][2].coef[0] = 63 - 4;
- corr[i][2].coef[1] = 64 + 4;
- corr[i][2].coef[2] = (1 << 29) / (63 - 4);
- corr[i][2].coef[3] = (1 << 29) / (63 - 4);
+ corr[i][2].prec = 0;
+ corr[i][2].coef[0] = 31 - 2;
+ corr[i][2].coef[1] = 32 + 2;
+ corr[i][2].coef[2] = (1 << 29) / (31 - 2);
+ corr[i][2].coef[3] = (1 << 29) / (31 - 2);
corr[i][3].type = JS_CORR_BROKEN;
- corr[i][3].prec = 0;
- corr[i][3].coef[0] = 31 - 2;
- corr[i][3].coef[1] = 32 + 2;
- corr[i][3].coef[2] = (1 << 29) / (31 - 2);
- corr[i][3].coef[3] = (1 << 29) / (31 - 2);
+ corr[i][3].prec = 1;
+ corr[i][3].coef[0] = 63 - 4;
+ corr[i][3].coef[1] = 64 + 4;
+ corr[i][3].coef[2] = (1 << 29) / (63 - 4);
+ corr[i][3].coef[3] = (1 << 29) / (63 - 4);
j = 4;
break;
+ case JS_SW_TYPE_FFW:
+
+ corr[i][0].type = JS_CORR_BROKEN;
+ corr[i][0].prec = 2;
+ corr[i][0].coef[0] = 511 - 8;
+ corr[i][0].coef[1] = 512 + 8;
+ corr[i][0].coef[2] = (1 << 29) / (511 - 8);
+ corr[i][0].coef[3] = (1 << 29) / (511 - 8);
+
+ corr[i][1].type = JS_CORR_BROKEN;
+ corr[i][1].prec = 1;
+ corr[i][1].coef[0] = 63;
+ corr[i][1].coef[1] = 63;
+ corr[i][1].coef[2] = (1 << 29) / -63;
+ corr[i][1].coef[3] = (1 << 29) / -63;
+
+ corr[i][2].type = JS_CORR_BROKEN;
+ corr[i][2].prec = 1;
+ corr[i][2].coef[0] = 63;
+ corr[i][2].coef[1] = 63;
+ corr[i][2].coef[2] = (1 << 29) / -63;
+ corr[i][2].coef[3] = (1 << 29) / -63;
+
+ j = 3;
+
+ break;
+
+ case JS_SW_TYPE_FSP:
+
+ corr[i][2].type = JS_CORR_BROKEN;
+ corr[i][2].prec = 0;
+ corr[i][2].coef[0] = 31 - 2;
+ corr[i][2].coef[1] = 32 + 2;
+ corr[i][2].coef[2] = (1 << 29) / (31 - 2);
+ corr[i][2].coef[3] = (1 << 29) / (31 - 2);
+
+ j = 3;
+
+ break;
+
default:
j = 0;
-
}
- for (; j < num_axes; j++) {
+ for (; j < num_axes; j++) { /* Hats & other binary axes */
corr[i][j].type = JS_CORR_BROKEN;
corr[i][j].prec = 0;
corr[i][j].coef[0] = 0;
@@ -358,83 +609,211 @@
}
/*
+ * js_sw_print_packet() prints the contents of a SideWinder packet.
+ */
+
+static void js_sw_print_packet(char *name, int length, unsigned char *buf, char bits)
+{
+ int i;
+
+ printk("joy-sidewinder: %s packet, %d bits. [", name, length);
+ for (i = (((length + 3) >> 2) - 1); i >= 0; i--)
+ printk("%x", (int)js_sw_get_bits(buf, i << 2, 4, 0, bits));
+ printk("]\n");
+}
+
+/*
+ * js_sw_3dp_id() translates the 3DP id into a human legible string.
+ * Unfortunately I don't know how to do this for the other SW types.
+ */
+
+static void js_sw_3dp_id(unsigned char *buf, char *comment)
+{
+ int i;
+ char pnp[8], rev[9];
+
+ for (i = 0; i < 7; i++) /* ASCII PnP ID */
+ pnp[i] = js_sw_get_bits(buf, 24+8*i, 8, 0, 1);
+
+ for (i = 0; i < 8; i++) /* ASCII firmware revision */
+ rev[i] = js_sw_get_bits(buf, 88+8*i, 8, 0, 1);
+
+ pnp[7] = rev[8] = 0;
+
+ sprintf(comment, " [PnP %d.%02d id %s rev %s]",
+ (int) (js_sw_get_bits(buf, 8, 6, 6, 1) | /* Two 6-bit values */
+ js_sw_get_bits(buf, 16, 6, 0, 1)) / 100,
+ (int) (js_sw_get_bits(buf, 8, 6, 6, 1) |
+ js_sw_get_bits(buf, 16, 6, 0, 1)) % 100,
+ pnp, rev);
+}
+
+/*
+ * js_sw_guess_mode() checks the upper two button bits for toggling -
+ * indication of that the joystick is in 3-bit mode. This is documented
+ * behavior for 3DP ID packet, and for example the FSP does this in
+ * normal packets instead. Fun ...
+ */
+
+static int js_sw_guess_mode(unsigned char *buf, int len)
+{
+ int i;
+ unsigned char xor = 0;
+ for (i = 1; i < len; i++) xor |= (buf[i - 1] ^ buf[i]) & 6;
+ return !!xor * 2 + 1;
+}
+
+/*
* js_sw_probe() probes for SideWinder type joysticks.
*/
static struct js_port __init *js_sw_probe(int io, struct js_port *port)
{
struct js_sw_info info;
- char *name;
- int i, j, axes, buttons;
- __u64 data;
- unsigned char u;
+ char *names[] = {NULL, "SideWinder 3D Pro", "Flight2000 F-23", "SideWinder GamePad", "SideWinder Precision Pro",
+ "SideWinder Force Feedback Pro", "SideWinder FreeStyle Pro", "SideWinder Force Feedback Wheel" };
+ char axes[] = { 0, 6, 6, 2, 6, 6, 5, 3 };
+ char buttons[] = { 0, 9, 9, 10, 9, 9, 10, 8 };
+ int i, j, k, l, speed;
+ unsigned char buf[JS_SW_LENGTH];
+ unsigned char idbuf[JS_SW_LENGTH];
+ unsigned char m = 1;
+ char comment[40];
+ comment[0] = 0;
if (check_region(io, 1)) return port;
- if (((u = inb(io)) & 3) == 3) return port;
- outb(0xff,io);
- if (!((inb(io) ^ u) & ~u & 0xf)) return port;
-
- i = js_sw_read_packet(io, JS_SW_MAX_LENGTH, -1, JS_SW_EXT_STROBE, &data);
-
- if (!i) {
- udelay(JS_SW_MIN_TIME);
- js_sw_init_digital(io);
- udelay(JS_SW_MAX_TIME);
- i = js_sw_read_packet(io, JS_SW_MAX_LENGTH, -1, JS_SW_EXT_STROBE, &data);
- }
-
- switch (i) {
- case 0:
- return port;
- case 5:
- case 10:
- case 15:
- case 20:
- case 30:
- case 45:
- case 60:
- info.mode = JS_SW_MODE_GP;
- outb(0xff,io); /* Kick into 3-bit mode */
- udelay(JS_SW_MAX_TIME);
- i = js_sw_read_packet(io, 60, -1, JS_SW_EXT_STROBE, &data); /* Get total length */
- udelay(JS_SW_MIN_TIME);
- j = js_sw_read_packet(io, 15, -1, JS_SW_MIN_STROBE, &data); /* Get subpacket length */
- if (!i || !j) {
- printk(KERN_WARNING "joy-sidewinder: SideWinder GamePad detected (%d,%d),"
- " but not idenfitied.\n", i, j);
- return port;
+
+ speed = js_sw_measure_speed(io);
+
+ i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Read normal packet */
+ m |= js_sw_guess_mode(buf, i); /* Data packet (1-bit) can carry mode info [FSP] */
+ udelay(JS_SW_TIMEOUT);
+
+#ifdef JS_SW_DEBUG
+ printk(KERN_DEBUG "joy-sidewinder: Init 1: Mode %d. Length %d.\n", m , i);
+#endif
+
+ if (!i) { /* No data. 3d Pro analog mode? */
+ js_sw_init_digital(io, speed); /* Switch to digital */
+ udelay(JS_SW_TIMEOUT);
+ i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Retry reading packet */
+ udelay(JS_SW_TIMEOUT);
+#ifdef JS_SW_DEBUG
+ printk(KERN_DEBUG "joy-sidewinder: Init 1b: Length %d.\n", i);
+#endif
+ if (!i) return port; /* No data -> FAIL */
+ }
+
+ j = js_sw_read_packet(io, speed, idbuf, JS_SW_LENGTH, i); /* Read ID. This initializes the stick */
+ m |= js_sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */
+
+#ifdef JS_SW_DEBUG
+ printk(KERN_DEBUG "joy-sidewinder: Init 2: Mode %d. ID Length %d.\n", m , j);
+#endif
+
+ if (!j) { /* Read ID failed. Happens in 1-bit mode on PP */
+ udelay(JS_SW_TIMEOUT);
+ i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Retry reading packet */
+#ifdef JS_SW_DEBUG
+ printk(KERN_DEBUG "joy-sidewinder: Init 2b: Mode %d. Length %d.\n", m , i);
+#endif
+ if (!i) return port;
+ udelay(JS_SW_TIMEOUT);
+ j = js_sw_read_packet(io, speed, idbuf, JS_SW_LENGTH, i);/* Retry reading ID */
+#ifdef JS_SW_DEBUG
+ printk(KERN_DEBUG "joy-sidewinder: Init 2c: ID Length %d.\n", j);
+#endif
+
+ }
+
+ k = JS_SW_FAIL; /* Try JS_SW_FAIL times */
+ l = 0;
+
+ do {
+ k--;
+ udelay(JS_SW_TIMEOUT);
+ i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Read data packet */
+#ifdef JS_SW_DEBUG
+ printk(KERN_DEBUG "joy-sidewinder: Init 3: Length %d.\n", i);
+#endif
+
+ if (i > l) { /* Longer? As we can only lose bits, it makes */
+ /* no sense to try detection for a packet shorter */
+ l = i; /* than the previous one */
+
+ info.number = 1;
+ info.io = io;
+ info.speed = speed;
+ info.length = i;
+ info.bits = m;
+ info.fail = 0;
+ info.ok = 0;
+ info.type = 0;
+
+ switch (i * m) {
+ case 60:
+ info.number++;
+ case 45: /* Ambiguous packet length */
+ if (j <= 40) { /* ID length less or eq 40 -> FSP */
+ case 43:
+ info.type = JS_SW_TYPE_FSP;
+ break;
+ }
+ info.number++;
+ case 30:
+ info.number++;
+ case 15:
+ info.type = JS_SW_TYPE_GP;
+ break;
+ case 33:
+ case 31:
+ info.type = JS_SW_TYPE_FFW;
+ break;
+ case 48: /* Ambiguous */
+ if (j == 14) { /* ID lenght 14*3 -> FFP */
+ info.type = JS_SW_TYPE_FFP;
+ sprintf(comment, " [AC %s]", js_sw_get_bits(idbuf,38,1,0,3) ? "off" : "on");
+ } else
+ info.type = JS_SW_TYPE_PP;
+ break;
+ case 198:
+ info.length = 22;
+ case 64:
+ info.type = JS_SW_TYPE_3DP;
+ if (j == 160) js_sw_3dp_id(idbuf, comment);
+ break;
}
- info.number = i / j;
- axes = 2; buttons = 10; name = "SideWinder GamePad";
- break;
- case 16:
- case 48:
- info.mode = JS_SW_MODE_PP; info.number = 1;
- axes = 6; buttons = 9; name = "SideWinder Precision Pro";
- break;
- case 64:
- case 66:
- info.mode = JS_SW_MODE_3DP; info.number = 1; info.optimize = 0;
- axes = 6; buttons = 8; name = "SideWinder 3D Pro";
- break;
- case 72:
- return port;
- default:
- printk(KERN_WARNING "joy-sidewinder: unknown joystick device detected "
- "(io=%#x, count=%d, data=0x%08x%08x), contact <vojtech@suse.cz>\n",
- io, i, (int)(data >> 32), (int)(data & 0xffffffff));
- return port;
+ }
+
+ } while (k && !info.type);
+
+ if (!info.type) {
+ printk(KERN_WARNING "joy-sidewinder: unknown joystick device detected "
+ "(io=%#x), contact <vojtech@suse.cz>\n", io);
+ js_sw_print_packet("ID", j * 3, idbuf, 3);
+ js_sw_print_packet("Data", i * m, buf, m);
+ return port;
}
- info.io = io;
+#ifdef JS_SW_DEBUG
+ js_sw_print_packet("ID", j * 3, idbuf, 3);
+ js_sw_print_packet("Data", i * m, buf, m);
+#endif
+
+ k = i;
request_region(io, 1, "joystick (sidewinder)");
+
port = js_register_port(port, &info, info.number, sizeof(struct js_sw_info), js_sw_read);
+
for (i = 0; i < info.number; i++)
- printk(KERN_INFO "js%d: %s at %#x\n",
- js_register_device(port, i, axes, buttons, name, js_sw_open, js_sw_close), name, io);
- js_sw_init_corr(axes, info.mode, info.number, port->corr);
+ printk(KERN_INFO "js%d: %s%s at %#x [%d ns res %d-bit id %d data %d]\n",
+ js_register_device(port, i, axes[info.type], buttons[info.type],
+ names[info.type], js_sw_open, js_sw_close), names[info.type], comment, io,
+ 1000000 / speed, m, j, k);
+
+ js_sw_init_corr(axes[info.type], info.type, info.number, port->corr);
return port;
}
@@ -463,9 +842,9 @@
int i;
struct js_sw_info *info;
- while (js_sw_port != NULL) {
+ while (js_sw_port) {
for (i = 0; i < js_sw_port->ndevs; i++)
- if (js_sw_port->devs[i] != NULL)
+ if (js_sw_port->devs[i])
js_unregister_device(js_sw_port->devs[i]);
info = js_sw_port->info;
release_region(info->io, 1);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)